iLCD Controller DPC10XX Series Documentation

Next Next Generation Generation Generation Intelligent Intelligent LCD LCD Panels 

Panels 

iLCD Controller DPC10XX Series 

Documentation 

Version 1.21 

Document Date: August 29, 2005 

Copyright © by demmel products 2004 - 2005 

Unless otherwise noted, all materials contained in this document are copyrighted by demmel products and may not 

be used except as provided in these terms and conditions or in the copyright notice (documents and software) or 

other proprietary notice provided with the relevant materials. 

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demmel products iLCD Controller Series DPC10XX Documentation 

Introduction 

The iLCD controller series DPC10XX are LCD high level 

controllers allowing the user to control his graphic LCD without 

having to do any low level programming. All required fonts, text 

messages and even animated graphics can be created via a 

powerful, easy to use PC setup software and stored to the flash 

memory of the controller. After setting up all required data the 

iLCD controller can be controlled even via a 50 cent low cost 

micro controller as all memory and time consuming tasks are 

carried out by the iLCD controller. 

The average saving of development time by using the DPC10XX 52-lead, Thin, Quad, Flat Package 

chips is about 3 months compared to doing all the low level stuff 

like outputting text with different fonts at any pixel position and/or 

showing graphics otherwise necessary. Scanning a keyboard matrix with up to 32 keys, controlling LEDs and 

relays, measuring analog voltages, reading digital inputs are some other features reducing the total cost of 

your application as these things are done by the iLCD controller as well. The minimum additional parts used 

for running the iLCD controller are a crystal and two capacitors. 

Please read the extra document "iLCD Commands" to learn about the various commands allowing you to 

easily control your display and input/outputs. 

Features Summary 

� Up to 196 Kbytes free flash memory for fonts, graphics, animated graphics, text messages and macros 

� All flash data can be updated at any time, even when the chip is integrated into your application 

� Built-in EEPROM emulation with 512 bytes can freely be used for application setup data 

� Allows you to use 100+ high level commands via RS232, RS422, RS485, I 2 C and USB 

� Complete firmware can be easily updated via the setup software allowing to add future features 

� Works with various LCD controllers from 122x32 pixel up to 320x240 pixel display size 

� Controls the backlight intensity of the LCD with optional fade out when turning off the backlight 

� Controls the contrast of your LCD even when the LCD needs a variable negative voltage 

� Scans a keyboard matrix with up to 32 keys – key assignment can be done via the setup software 

� Drives up to 6 digital outputs / LEDs (on/off/blinking with user definable blink frequency) 

� Controls 2 relays or a speaker/buzzer and a PWM output (future feature) 

� Provides up to 4 digital inputs or analog inputs with 8 bit ADC 

� Controls a PC's ATX power supply via high level commands 

� A user controllable watch dog allows supervising your application 

Device Summary 

Features DPC1010 DPC1011 DPC1030 DPC1050 

Free Flash memory 70 kByte 196 kByte 

Free EEPROM 512 Byte 

Free internal RAM 4 kByte 28 kByte 

Communication 

Ports 

2 x UART, I 2 C 2 x UART, I 2 C, USB 

I/O Ports 4 x General I/O, keyboard matrix with up to 32 keys, ATX power control 

Touch screen 

support 

No Yes 

Operating Voltage 4.5…5.5 V 3.0…3.6 V 4.5…5.5 V 4.5…5.5 V 

Quiescent Current 30 mA 25 mA 30 mA 30 mA 

Ambient Operating 

Temperature 

0 … 70° C 

Operating 

Frequency 

36.0 MHz 22.1184 MHz 36.0 MHz 36.0 MHz 

Copyright © by demmel products, Document Date:: August 29, 2005 Page 1 of 12


Supported LCD controllers 

Currently, the iLCD controller series DPC10XX support the following LCD controllers: 

LCD Controller MPU Mode Max. Display Size (Pixels) 

SED1520 8080 122x32 

SPLC5101C 8080 128x64 

SED1565 8080 128x64 

KS107/108 6800 128x64 

T6963C 8080 240x128 

SED1335/S1D13305 8080 320x240 

S1D13700 8080 320x240 

Support of LCD controllers is an issue of the iLCD's controller firmware. Updating the iLCD's controller 

firmware may give support to additional LCD controllers. Please ask demmel products if you do not find your 

required LCD controller in the list above. 

Pin Configuration 

ASPWR 1 

Pin Description 

KBC1 2 

TDO 3 

TDI 4 

USB- 5 

KBC0 6 

USB+ 7 

VCC 8 

GND 9 

APWR 10 

ARES 11 

TCK 12 

TMS 13 

Pins Used for LCD Control 

D0-D7 (Data Port) 

D0 

D1 

52 

51 

14 

15 

REL0 

REL1 

D2 

D3 

50 

49 

16 

17 

KBC3 

BL 

CL 

D4 

D5 

VREF 

48 

47 

18 

19 

GND 

CS1 

46 

45 

20 

21 

39 GP1 

38 GP0 

37 TXD1 

36 RXD1 

35 WR 

34 RD 

33 VCC 

32 XTAL2 

31 XTAL1 

30 SCL 

29 SDA 

28 KBC2 

27 CTS 

Copyright © by demmel products, Document Date:: August 29, 2005 Page 2 of 12 

GND 

RESET 

CS0 

AD 

44 

43 

D6 

D7 

GP3 

GP2 

22 

23 

RXD0 

TXD0 

42 

41 

DPC10XX 

Data Port is an 8-bit open drain bidirectional I/O port used to write data to / read data from the LCD 

controller in conjunction with RD, WR, CS0, CS1 and AD. As an output port, each pin can sink eight TTL 

inputs. Data Port is also used to read in the column information from the keyboard matrix. If the keyboard 

matrix is used, pull up resistors have to be used for the data port and the keyboard matrix has to be 

connected via diodes to avoid short circuits when more than one key is pressed simultaneously. 

24 

25 

40 

26 

APSWI 

ALERT


RD (Read) 

This pin is used to read data from the LCD controller in conjunction with CS0, CS1 and AD when the LCD 

controller uses 8080 MPU interface mode; it has to be connected to the LCD controller's ¯¯ RD (active low) pin. 

If the LCD controller can only handle 6800 MPU interface signals (e.g. KS107/108), RD has to be 

connected to the R/W¯ pin of the LCD controller. 

Please note that the iLCD controllers use the 8080 MCU mode only when the LCD supports this mode; your 

LCD has to be wired in the appropriate way to select the 8080 MCU mode according to the LCD 

specification got from your LCD manufacturer. The 6800 MPU mode is only used if the selected LCD 

controller does not support the 8080 MCU mode. 

WR (Write) 

This pin is used to write data to the LCD controller in conjunction with CS0, CS1 and AD when the LCD 

controller uses 8080 MPU interface mode; it has to be connected to the LCD controller's WR ¯¯ (active low) pin. 

If the LCD controller can only handle 6800 MPU interface signals (e.g. KS107/108), WR has to be 

connected to the E (active high) pin of the LCD controller. 

Please note that the iLCD controllers use the 8080 MCU mode only when the LCD supports this mode; your 

LCD has to be wired in the appropriate way to select the 8080 MCU mode according to the LCD 

specification got from your LCD manufacturer. The 6800 MPU mode is only used if the selected LCD 

controller does not support the 8080 MCU mode. 

AD (Address Enable) 

Output pin used to control the LCD in conjunction with RD, WR, CS0 and CS1. Set to high when data is to 

be sent/read to/from the LCD, set to low when an instruction is sent. Connect this pin the corresponding LCD 

controller input (called AD, A0, C/D or similar depending on the manufacturer of the LCD). 

CS0 (Chip Select 0) 

This pin (active low) is used to enable the LCD controller in conjunction with RD, WR, AD and CS1. Connect 

this pin to the LCD controller's CS (or CS1 if it has CS1 and CS2) pin. 

CS1 (Chip Select 1) / LCD Reset 

This pin (active low) is used to enable the LCD controller in conjunction with RD, WR, AD and CS0. Connect 

this pin to the LCD controller's CS2 if it has CS1 and CS2 pin. If your LCD has only one chip select, this pin 

can be used for resetting the LCD (active low), connect this pin with the LCD's reset input RST ¯¯ in this case. 

CL (Clock/Contrast) 

This pin outputs a clock signal with a frequency of approximately 7.81 kHz with variable duty cycle of about 

10 to 90 percent depending on the actual LCD contrast setting. Higher contrast values decreases the high 

time of this output, lower values increase the high time of CL. A simple circuit may be connected to this pin 

to control the value of the negative operating voltage of the LCD. CL is permanently pulled high during the 

iLCD controller's initialization (takes about 0.6 seconds); this allows one to add a circuit to disconnect the 

pull-up resistor of USB- to force the PC to re-enumerate the USB bus when the iLCD controller is rebooted. 

BL (LCD Backlight Control/Flash Erase) 

This output pin is used to control the LCD's backlight via pulse width modulation from permanent high 

(backlight off) to permanent low (backlight on without pulse width modulation). Use an appropriate transistor 

stage to drive the LCD's backlight LEDs. If this pin is pulled low during a reset of the iLCD controller, the user 

data Flash is completely erased and default values are set (useful if e.g. the baud rate is set to an unknown 

value, as the default baud rate after the Flash erase is set to 115200 baud). 



Input/Output Pins 

GP0-GP3 (General Purpose I/O) 

These 4 pins can be used for digital input, digital output, LED output or ADC input. The usage of the single 

pins can be set via the iLCD's setup software. 

When using the port pin as an output a sink current of up to 8mA per output can be drawn, use a resistor to 

limit the current accordingly when driving a LED (anode connected to VCC). The maximum source current is 

80 µA for an output voltage of 2.4 Volt when the pin is used as an output and set to high. 

When using one of the General Purpose I/O pins as and ADC (8 bit resolution) input, the valid input range 

is 0…5 Volt (resulting in a readout of 00 .. FF) when the VREF pin is tied to VCC. When VREF is set to a 

different voltage by e.g. using a micro power reference, the maximum input voltage is given by the voltage 

applied on the VREF pin; an input voltage of VREF gives the readout of FF then. GP0 and GP1 are 

alternatively used to read in the analog values of a resistive touch panel (see the Reference Design) 

REL0, REL1 (Relay Outputs) 

Relays output pins (active high) for driving a transistor state controlling a relay. The relay outputs can be 

switched high or low by an appropriate iLCD command; single shots (active on or off) with a resolution of 

10ms can be triggered too. To avoid switching the transistor stage on during reset, a pull down resistor of 

4k7 should be added. When the iLCD's firmware gets initialized, this pins are set to push-pull mode allowing 

to output drive the transistor stage accordingly. 

iLCD controller's firmware versions greater than 2.0 enable the REL0 pin to be used as a PWM (pulse width 

modulation) output with selectable frequency, duty cycle and polarity to control e.g. a speaker or buzzer thus 

allowing to generate beep sequences with variable durations and frequencies. REL1 can be used as a fixed 

frequency (approximately 7.81 kHz) PWM output too when the firmware extension is available. 

KBC0-KBC3 (Keyboard Column Output) 

KBC0-KBC3 are output pins used for scanning the keyboard matrix, they can be connected directly to the 

column wires of an 8x4 matrix keyboard. The rows of this keyboard have to be connected via a diode / pullup 

resistor combination to D0-D7. KBC2 and KBC3 are also used to drive LED4 and LED5 (anode to VCC) 

via a resistor; no visible effect of keyboard scanning can be seen on the LEDs as the scanning process 

(pulling the pin low) is very short and occurs only every 10 ms, but using these pins as a static output is not 

possible. If column 2 / 3 of the keyboard is in use, LED 4 / 5 should not be turned on, as pressing a key can 

collide with iLCD's internal display processing routines. 

ASPWR 

Output pin to disconnect the ATX power supply's power switch from the PC's mainboard. This pin is high at 

startup and pulled to low when the iLCD controller receives the command "Set Smart Power Off Mode" is set 

to on (see the extra document "iLCD Commands"). The alternative function of this pin is to control the touch 

panel (see the Reference Design). 

APWR 

Output pin to switch an ATX power supply off. This pin is set to high when the iLCD controller switches the 

ATX power supply off. For further information about controlling an ATX power supply see the extra document 

"iLCD Commands". The alternative function of this pin is to control the touch panel (see the Reference 

Design). 

ARES 

Output pin to reset the controlling application circuit (PC's mainboard or micro controller). Set to high for a 

selectable time, when the user definable watchdog expires. For further information about user definable 



watchdog see the extra document "iLCD Commands". The alternative function of this pin is to control the 

touch panel (see the Reference Design). 

APSWI 

Input pin to detect a pressure of the ATX power switch. 

Communication Related Pins 

Communication to the iLCD controller can be done via 2 separate serial ports, I 2 C and USB. There is no 

need to setup the communication port to use, the iLCD controller automatically detects the actual port and 

responds to the port recently used. Even during the normal operating mode the port can be changed on the 

fly. 

RXD0 

Serial port receive pin of serial port 0. The baud rate can be set from 300 up to 115200 (default) baud via 

the setup software. When using a non 5 volt RS232 port, this pin has to be connected to the output of a 

RS232 receiver like MAX232. 

TXD0 

Serial port transmit pin of serial port 0. The baud rate can be set from 300 up to 115200 (default) baud via 

the setup software. When using a non 5 volt RS232 port, this pin has to be connected to input of a RS232 

transmitter like MAX232. 

CTS 

Output for common serial port hardware flow control. Used to avoid overflowing the iLCD's input buffer. 

Note that this pin is common for serial port 0 and serial port 1, that means when the iLCD's 128 byte input 

buffer is filled with more than 64 byte this pin goes high independently of the serial port in use. When the 

input buffer contains less than 42 bytes, this pin returns to low. 

When using a non 5 volt RS232 port, this pin has to be connected to input of a RS232 transmitter like 

MAX232; the input of this gate has to be connected to the PC's CTS line. See some further informations 

about using hardware handshake in the extra document "iLCD Commands" chapter "Command Structure". 

RXD1 

Same functionality as RXD0 for the second serial port. 

TXD1 

Same functionality as TXD0 for the second serial port. Note that RXD1 and TXD1 can be connected to a 

RS422/RS485 driver like a MAX489 as well. In this case ALERT is used to control transmission of characters 

(set to low during transmission of characters, returned to high right after the stop bit of the last character has 

been sent). 

When using the RS422/RS485 (enabled via the setup software) the ALERT pin cannot be used to signal data 

availability to the I 2 C master anymore, the I 2 C master must poll the status register to determine if any data is 

available to be sent. 

SDA 

I 2 C / SMBus data pin. Note that the 7 bit address of the I 2 C bus can be freely selected via the setup program 

and the I 2 C bus must be enabled via this software. When using the I 2 C bus the last device should have a 

pull-up resistor on SDA and SCL according to the I 2 C / SMBus specification. 



A good starting point of how to use I 2 C is Philips' I 2 C-Bus specification available at 

http://www.demmel.com/download/ilcd/i2c/i2c_bus_specification.pdf and SMBus specification available at 

http://www.demmel.com/download/ilcd/i2c/smbus_specification.pdf. 

Please see the extra document "iLCD Commands" to learn about how to control the iLCD controller via I 2 C. 

A reference to a I 2 C sample code is referenced in this document as well. 

SCL 

I 2 C / SM-bus clock pin. See the description of SDA for further details. 

ALERT 

Output pin to indicate data availability to the I 2 C master. Held low as long as there are any unsent data in 

the iLCD controller's I 2 C output queue. 

When using the RS422/RS485 mode on the second serial port the ALERT pin cannot be used to signal data 

availability to the I 2 C master, the I 2 C master must poll the status register to determine if any data is available 

to be sent. 

An upcoming document and some sample code will describe further details about how to use the iLCD 

controller's I 2 C bus; please ask demmel products for availability. 

USB-, USB+ 

Pins used for USB communication. Connect these pins via a serial 100E resistor to the PC's USB+ and USB- 

pins. The PC's USB- pin has to be connected via a 7k5 resistor to VCC as well to indicate USB bus 

availability. Please note that reconnecting to USB after a iLCD controller's reboot is only possible by 

disconnecting the 7k5 pull up resistor for a minimum time of 20 ms. This can be done by detecting non CL 

toggling (CL is pulled to high during startup of the iLCD controller) via a small separate circuit. 

Other Pins 

VCC 

Supply voltage. Connect all VCC pins to 5 Volt. 

GND 

Ground. Connect all GND pins to ground. 

XTAL1, XTAL2 

Connect a 36.0 or 22.1184 MHz crystal (depending on the chip model) to XTAL1 and XTAL2 and a 22pF 

capacitor from XTAL1 and from XTAL2 to ground. An external clock may be feed to XTAL1 instead of using 

the built in oscillator. Do not use different frequencies than 36.0 or 22.1184 MHz. 

RESET 

A low signal of minimum 200 ns resets the iLCD controller. A simple 4k7 / 1µF (resistor connected to VCC) 

combination may be used to ensure a proper power up reset. Please note that the iLCD controller may reset 

also when the internal watchdog expires in case of errors or when an undervoltage (that means a VCC below 

4.0 Volt ±0.25 Volt) condition is detected. In both cases the RESET pin does not reflect the reset occurred 

internally. 



VREF 

Reference voltage input for the iLCD controller's ADC. Connect it either to VCC (giving an ADC input range 

from 0 … VCC) or to a reference voltage of e.g. 2.500 or 4.000 Volt created by a micro power reference 

chip. 

TDO, TDI, TCK, TMS 

These pins are used for factory programming of the iLCD controller and should not be used. Reference 

designs made by demmel products connect TDO to a square post pin and connect the other pins as follows: 

TCK �� APSWI, TDI �� ALERT and TMS �� KBC3. As all of these pins are connected to square posts, 

full reprogramming of the iLCD controller can be done. 

Command Set 

Please see the extra document "iLCD Commands" which describes the common command set available for 

all iLCD controllers. 

Reference Design 

The following two pages show a reference design with serial port and USB connection and touch panel 

control. 







Package Mechanical Information 

TQFP52 – Package Outline 

Ne 

N 

1 

QFP-A 

Note: Drawing is not to scale. 

D 

D1 

D2 

Nd 

Copyright © by demmel products, Document Date:: August 29, 2005 Page 10 of 12 

E2 

E1 

E 

A1 

L1 

L 

A 

A2 

c 

e 

b 

CP


TQFP52 – Package Mechanical Data 

Symbol 

Typ 

mm 

Min Max Typ 

inches 

Min Max 

A – – 1.75 – – 0.069 

A1 – 0.05 0.020 – 0.002 0.008 

A2 – 1.25 1.55 – 0.049 0.061 

b – 0.02 0.04 – 0.007 0.016 

c – 0.07 0.23 – 0.002 0.009 

D 12.00 – – 0.473 – – 

D1 

D2 

10.00 – – 0.394 – – 

E 12.00 – – 0.473 – – 

E1 

E2 

10.00 – – 0.394 – – 

e 0.65 – – 0.026 – – 

L – 0.45 0.75 – 0.018 0.030 

L1 1.00 – – 0.039 – – 

α – 0° 7° – 0° 7° 

n 52 52 

Nd 13 13 

Ne 13 13 

CP – – 0.10 – – 0.004 



Revision History 

Date Rev. # Revision Details 

August 29, 2005 1.21 Added reference to the "iLCD Commands" document regarding I 2 C 

"Device Summary" supplemented 

Added list of supported LCD controllers 

June 21, 2005 1.2 Added hint not to use LED 4/5 when keyboard column 2/3 is in use 

June 13, 2005 1.1 Added Reference Design 

Changed rows and columns of keyboard 

Added alternative pin descriptions for touch panel control 

June 10, 2004 1.0 First Issue 

If you find any errors in this document, please contact demmel products at support@demmel.com 



Information furnished is believed to be accurate and reliable. However, demmel products assumes no responsibility for 

the consequences of use of such information nor for any infringement of patents or other rights of third parties which may 

result from its use. No license is granted by implication or otherwise under any patent or patent rights. Specifications 

mentioned in this publication are subject to change without notice. This publication supersedes and replaces all 

information previously supplied. demmel products products are not authorized for use as critical components in life 

support devices or systems. 

All names are the property of their respective owners. 

© 2004 - 2005 demmel products - All Rights Reserved 

www.demmel.com 

www.demmel.com

iLCD Controller DPC10XX Series Documentation

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